Nanometric Boehmite Plasterboards High Temperature Stability
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Solution Overview
Problem
Conventional plasterboards face challenges in achieving satisfactory dimensional stability at high and very high temperatures, often requiring costly additives like glass fibers that complicate manufacturing, and existing additives may not provide sufficient fire resistance.
Innovation Solution
Incorporating nanometric boehmite and/or nanometric aluminium trihydroxide into the plaster-based composition, which improves dimensional stability at high temperatures and can reduce or eliminate the need for glass fibers, while enhancing fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional additives (vermiculite, perlite, crystalline silica, clay materials, boron compounds, silicon compounds, aluminium compounds) are incorporated into plaster composition to improve fire resistance, then fire resistance is improved, but manufacturing complexity and cost increase significantly with only slight improvement in dimensional stability
Solution Approach 1:
The patent changes the particle size parameter of aluminium-based additives from conventional micrometer scale to nanometric scale (specifically nanometric boehmite and nanometric aluminium trihydroxide). This parameter change enables the additive to provide both fire resistance and dimensional stability without the manufacturing complexity associated with glass fibers, while achieving superior performance at lower concentrations (0.1-10 wt%).
Solution Approach 2:
The patent replaces expensive and complex glass fiber additives with cheaper nanometric aluminium-based compounds (boehmite and aluminium trihydroxide) that can be easily incorporated into the plaster mixture. These nanometric additives provide equivalent or superior fire resistance and dimensional stability at lower cost and with simpler manufacturing processes.
2Stability of the object's composition
If glass fibres are incorporated into plasterboards to maintain cohesion during shrinkage at high temperature, then dimensional stability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the particle size parameter from conventional fiber dimensions to nanometric scale (0.1-10 wt% nanometric boehmite and/or nanometric aluminium trihydroxide). This nanometric scale transformation allows the additive to function as both a fire-resistant agent and a cohesion-maintaining element during thermal shrinkage, eliminating the need for glass fibers and simplifying manufacturing.
3Ease of manufacture
If conventional plaster composition is used without nanometric additives, then manufacturing is simple, but dimensional stability at very high temperature (above 850°C) is insufficient
Solution Approach 1:
The patent introduces nanometric boehmite and/or nanometric aluminium trihydroxide at concentrations of 0.1-10 wt% into the plaster composition. This parameter change (adding nanometric additive) maintains manufacturing simplicity while dramatically improving dimensional stability at very high temperatures above 850°C, where conventional plaster compositions fail.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The addition of nanometric boehmite and/or aluminium trihydroxide significantly improves fire resistance and dimensional stability at temperatures above 850°C, potentially replacing traditional fire-resistant components like glass fibers and vermiculite, and allows for simpler manufacturing processes.
Implementation Method 1
improve dimensional stability/limit shrinkage at high temperature, in particular at very high temperature
Implementation Method 2
nanometric boehmite and/or nanometric aluminium trihydroxide... making it possible to improve dimensional stability/limit shrinkage at high temperature
Data Source
AI summary
The invention relates to a plaster-based composition comprising nanometric boehmite and/or nanometric aluminium trihydroxide, this composition making it possible to obtain products having better dimensional stability at high and in particular at very high temperature. The invention also relates to the method of obtaining the products, and the products produced.